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Arterial blood gases |
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1. Common sites include the radial, brachial and femoral arteries. If contemplating selecting a radial artery, ensure the ulna artery is functioning beforehand. 2. Prime the blood gas syringe (Pulsator) by expelling excess Heparin and air from the syringe. 3. Cleanse the skin. 4. Select the site by palpating the relevant artery proximal to the proposed puncture site and insert the needle into the vessel at approximately 45 degrees to the skin. The plunger should rise spontaneously on entering the artery due to the high pressure. Obtain 5ml and remove needle from tube and place cap on the syringe. 5. Apply firm pressure to the puncture site for at least 5 minutes. 6. If the sample is likely to be in transit for more than 5 minutes then pack in ice. 7. Make a note of the inspired oxygen concentration at time of taking sample. |
